drop in rpm

[351w fastback]

i just added an electric fan from a tauras and now when i turn it on, the engine rpm drops about 200 rpm. what would cause this? thanks

 

[dennis112]

i just added an electric fan from a tauras and now when i turn it on, the engine rpm drops about 200 rpm. what would cause this? thanks

Alternator drag from trying to give the fan the juice that it needs.

 

[351w fastback]

is that normal then? i just put on a 130 amp alternator from a 94 mustang.

 

[MustangMatt1966]

yup, normal, but if u upgrade the alternator and still have the original wiring, its pretty worthless....